NPOI Measurements of Ten Stellar Oscillators

Autor:	Baines, Ellyn K., Armstrong, J. Thomas, Schmitt, Henrique R., Benson, James A., Zavala, R. T., van Belle, Gerard T.
Rok vydání:	2014
Předmět:	Astrophysics - Solar and Stellar Astrophysics
Zdroj:	Astrophysical Journal, 2014, 781, 90
Druh dokumentu:	Working Paper
DOI:	10.1088/0004-637X/781/2/90
Popis:	Using the Navy Precision Optical Interferometer, we measured the angular diameters of 10 stars that have previously measured solar-like oscillations. Our sample covered a range of evolutionary stages but focused on evolved subgiant and giant stars. We combined our angular diameters with Hipparcos parallaxes to determine the stars' physical radii, and used photometry from the literature to calculate their bolometric fluxes, luminosities, and effective temperatures. We then used our results to test the scaling relations used by asteroseismology groups to calculate radii and found good agreement between the radii measured here and the radii predicted by stellar oscillation studies. The precision of the relations is not as well constrained for giant stars as it is for less evolved stars. Comment: 22 pages, 5 figures. arXiv admin note: text overlap with arXiv:1306.4322
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1401.3342 Zobrazit plný text záznamu View this record from Arxiv